/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.zeppelin.utils;

import javax.websocket.Session;

public class ServerUtils {
  private ServerUtils() {
    // do nothing
  }

  /**
   *
   * @param session
   * @return the remote address of the websocket or "unknown" if session is null
   */
  public static String getRemoteAddress(Session session) {
    if (session != null && session.getUserProperties() != null) {
      return String.valueOf(session.getUserProperties().get("javax.websocket.endpoint.remoteAddress"));
    }
    return "unknown";
  }
}
